Hello Jonas,
Thank you for your reply. I have updated to the most recent TBC version 2024.10 and I am still having this issue. For most of my projects it makes the "Merge Survey Projects" command useless for me, and this is a major part of our data workflow.
Below is a screen shot of Test Job 2 when the job file is imported directly into TBC. You can see the linework processes out correctly and Feature codes are populated for line features.

In the next screen shot you can see I am importing the above file into Test Job 1. Using the merge Survey projects command:
Points that are associated with a line feature code have the feature code completely removed. However, points that are not a Line or Polygon related feature show up just fine. In this example a "G" (Ground) Point shows up fine.

In the point spreadsheet you can see there are no feature codes after import.

I have uploaded this example for your review. I have included test Job 1 & 2 when Processed independently. I then Included my merged result when trying to import Job 2 into Job1.
Thanks for your time and I look forward to your findings.
Cheers,
SL